<template>
	<view>
		<!-- 搜索框 -->
		<!-- <my-search bgColor='#000000' radius=2></my-search> -->
		<my-search @click="gotoSearch()"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧滚动视图 -->
			<scroll-view scroll-y="true" class="left-scroll-view" :style="{height: uniheight + 'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',active === i?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧滚动视图 -->
			<scroll-view scroll-y="true" class="right-scroll-view" :style="{height: uniheight + 'px'}" :scroll-top="scroolTop">
				<!-- 二级分类列表 -->
				<view class="right-scroll-view-item" v-for="(item2,i2) in cateLevel2" :key="i2">
					<view class="scroll-view-level2">/{{item2.cat_name}}/</view>
					<!-- 二级分类列表下的三级分类 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<image :src="item3.cat_icon.replace('dev','web')"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default{
		mixins:[badgeMix],
		data() {
			return {
				// 可使用窗口的高度
				uniheight:0,
				// 被激活的索引
				active:0,
				//分类列表
				cateList:[],
				// 二级分类列表
				cateLevel2:[],
				// 距离顶部
				scroolTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.uniheight = sysInfo.windowHeight - 50
			
			// 获取分类的方法
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i){
				this.active = i
				this.cateLevel2 = this.cateList[i].children
				this.scroolTop = this.scroolTop === 0 ? 1 : 0
			},
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?cateid=' + item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	
	.left-scroll-view{
		width: 150px;
		.left-scroll-view-item{
			line-height: 60px;
			text-align: center;
			background-color: #efefef;
			font-size: 12px;
			&.active {
				background-color: #FFFFFF;
				position: relative;
				&::before{
					content: ' ';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #C00000;
					position: absolute;
					left: 0%;
					top: 50%;
					transform: translateY(-50%);
				}
			}
		}
		
	}
	
	.scroll-view-level2{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width:33.3%;
			display: flex;
			flex-direction: column;
			align-items: center;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
}
</style>
